Waterproofing cloth



No Drawing.

' man STAlES? P CABMELO 310mm,, or nosron, MASSACHUSETTS.

WATERPROCFING CLOTH.

To all whom, it may concern:

Be it known that I, CARMELo BIONDO, a, subject of the King of Italy, and resident of j Boston, county of Suffolk, Commonwealth of Massachusetts, have invented an Improvement in Waterproofing 'Cl'oth, of which the following description is a specification.

This invention relates-to the waterproofin of cloth, such as articles of wearing appare and while applicable to other kinds of fabric is well adapted and designed for waterproofing woolen cloths. A principal object ofthe invention is to provide means for rendering a cloth ofjwool or other material substantially waterproof, while still retain-' ing its original porous andpliable condition in large degree. A further object is to provide for waterproofing a fabric in a manner so that its appearance and qualities in use are not materially affected. To this end the invention consists in an improved formula for a Waterproofing solution into which the cloth is dipped, and in an improved method of treating the cloth in connection with this solution.

In preparing the Waterproofing solution of my invention, I heat to the boiling point tenliters, i; e., a little more than two gallons of water. To this is first added one pound of sodium carbonate which .is dissolved therein by stirring. I then add one ounce of castor oil and one ounce of spirits of turpentine. I then stir into the hot solution two pounds of alum. This results in a chemical reaction wherein the mass increases about four times in volume and becomes of a foamy and milky consistency. of the alum upon the solution is to convert it partially into a resinate and oleate of aluminum.- The stirring of the solution is.

dipped into the solution and left about two The action Application filed February 12, 1921. "lSeria1 Ito/444,599.

use. In the practice of the invention certain equivalents may be used to'some extent 'in place 'of those named; thus in place of the turpentine, alcohol with a variety of rosin known as Greek tar may be employed, and for the castor oil olive'oil'and cocoaoil may be substituted. I therefore desire the benefit of a-reasonable range of equivalents with respect to the appended *claims.

Having described my invention, whet v claim asnew and'desire to secure by Letters Patent is:

1. The herein described method of making a waterproofing solution which consists in adding to .ten liters of hotwater, one pound ofsodium carbonate and one ounce of castor oil, one ounce of spirits of turpentine and then stirring'in two pounds of alum. 2. A waterproofing solution made up of the reaction products of approximately ten liters of water, one pound of sodium car-- bonate, one ounce of castor oil, one ounce of spirits of turpentine and 'two pounds of alum.

3. The herein described method which consists in providing .a waterproofing solution containing resinate and oleate of aluminum, dipping the fabric to be treated therein for a substantial interval, drying and then washing the fabric.

4. The herein described method which conslsts in providing a waterproofing solution as set forth in claim 1, immersing the fabric to be treated therein for a substantial interval, partially rinsing the fabric, drying the same, and then cleansing the fabric with water. j

In testimony where0f ,'I have signed my name to this specification.

CARMELO BIONDO. 

